Film-perforating device for moving-picture-taking machines.



11. 0; LAW. FILM PERFORATING DEVICE FOR MOVING PICTURE TAKING MACHINES.

APPLICATION FILED APR. 18. 1911.

Patented 512b, 10, 1924.

WITNESSES by means of a spring, 56.

9 UNITED s'rATEs PATEN C nvrr o. LAW, or ROXBORO, PENNSYLVANIA. ASSIGNORTo AMERICAN AnrocRArH.

COMPANY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION or PENNSYL- VANIA.

Specification of Letters Patent.

Patented Fa). 10, 1914-.

Application filed April 18, 1911. Serial No. 621,893.

To all whom it may concern Z a curved spring-arm, 64. The pinion Be itknown that I, DUFF C. LAw, a, citizen of the United States, residing atRoxouter end bent in the direction of its rotaboro, county ofPhiladelphia, State of Pennsylvania, have invented anew and usefulFilm-Perforating Device for Moving-'1 P1cture-Tak1ng Maclnnes, of whichthe fol- Z lowing is a specification.

My invention consists of improved means in a moving picture takingmachine for perforating a film i the images produced upon the same.

It further consists of other novel features of construction, all will behereinafter fully setforth.

The annexed drawingsand the following 1 description set forthin detail,one mechanical. form embodying the invention, such detail constructionbeing but one of various mechanical forms in which the principle of theinvention may be used.

In said annexed drawings :Figure 1 represents a vertical section of asmuch of a moving picture taking .machine as will illustrate the punchingdevice and its cooperating parts. Fig. 2 represents a perspective detailview of the feeding cam, the film-guide" and the film'punching device.Fig. 3 represents a horizontal section 011 the line z2 in Fig. 1.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, the numeral 1 indicates the casing of themachine, the front wall of which is formed with vertical film-guides, 2,and with an exposure opening, 3, in which a suitable camera may besecured within a casing, 54, surrounding the exposure opening. A door,47,, is supported upon the front-wall of the casing and has aglass-plate, 55, loosely supported in it and held against the film, f,sliding in the guides The sensitive film is fed-from a suitable reel(not shown),

'and passes down along the film-guides, be-

ing held by the glass-plate in the door. A shaft, 26, is journaled inthe machine frame and has a hand-crank, 27, for turning it. A cog-wheel,28, is secured upon said shaft and meshes with-a pinion, 32*, Whichmeshes with a pinion, 35, upon the shaft ofwhich is secured a roller,63, having peripheral teeth at its ends. The film passes around saidroller and is held against the same by 11 perfect register with guides.

32* meshes with a pinion, 32, upon the shaft, 33, of an eccentricfeed-cam 14, having its tion. The shaft of this cam is journaled so thatthe point of the cam will project during its rotation at the lower endsof the film- Two brackets, 58, are secured at the lower ends of thefilm-guides to have the feed-cam pass between them, and two punches, 5T,slide horizontally in said brackets and have springs, 60, hearingagainst pins, 59, upon their inner ends to force said punches inwardagainst the peripheries of two eccentrics, (32, upon the feed-cam shaft.

llhen the machine is operated, the sensitized film is passed down in thefilm-guide,

beneath the feed-cam and around the roller to a suitable receiving reelVhen the lens of the camera is uncovered and the crank rotated, thefeed-cam will at each revolution. pull the film down for the space ofone image or exposure, and, as the bulges of the eccentrics upon thefeed-ram shaft pro ject diametrically opposite to the feed-cam, saidbulges will actuate the. punches to perforate the film while the latteris at rest and at equidistant points at each revolution of thecam-shaft, bringing the perforations in exact register with theconsecutive exposures.

The peripheral teeth upon the roller 63 will engage the perforations inthe film and feed the film to a receiving reel or other suitablereceiving device.

By reason of the feed-cam and the eceentries being upon the same shaft,absoluteaccuraov of registration in exposures and perforations will beattained and by exceedingly simple. positive and directmeans.

Other modes of applying the principle of the invention may be employt-ulfor the mode herein explained. Change may therefore be made as regardsthe mechanism thus disclosed, provided the principles of constructionset forth respectively in the following claims are employed.

Having thus describedmy invention.what I claim as new and desire tosecure hyl icn ters Patent, is

1. A machine for taking motion pictures and having a film-guide formedwith an exposure-opening, punches supported to traverse the edges ofsuch guide and having means for automatically retracting them, a

shaft j ournaled transversely to said film-guide and adjacent saideXpcsure-opening and having means for rotatingit, an eccentric feed-camupon said shaft and engaging the film .in'said guide to intermittentlymove it across said opening, and eccentric disks upon said shaft havingtheir bulges projecting oppositely to said feed-cam and engaging thepunches.

2-. A machine for taking motion pictures and having a film-guide formedwith an exposure-opening, brackets on opposite edges of said guide,punches slidable in said brackets to traverse the edges of said guide,means for automatically retracting said punches, a shaft journaledtranversely to the ends of said brackets and punches, and having meansfor 'rotating it, an eccentric feed-cam upon said shaft and. betweensaid brackets and engaging the film in the guide to interniittently moveit across the exposureopening, and eccentric disks upon the shaftengaging the punches and having their bulges projecting oppositely tothe feed-cam.

DUFF C. LAWV. lVitnesses C. D. MoVAY, F. A. NEWTON.

